/ best free open source web resources /

Ajax AutoComplete jQuery Plugin for Textfields

It is built with focus on performance. Results for every query are cached and pulled from local cache for the same repeating query. If there are no results for particular query it stops sending requests to the server for other queries with the same root.

It has been tested on IE 7+, FF 2+, Safari 3+, Opera 9+. And it is is freely distributable under the terms of an MIT-style license.